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400G ZR or 400ZR is a networking standard designed to enable 400GE transmission over Data Center Interconnect links. 400ZR supports up to 80 km links and it utilizes a technology called “Dense Wavelength Division Multiplexing”. 400G ZR tends to provide long-term, single-carrier 400G implementation through dual-polarization 16 QAM at around 60 gigabaud where 16 QAM stands for 16-state Quadrature Amplitude Modulation.

50/125μm and 62.5/125μm fibers are commonly referred to as multimode fibers. The inner diameter of the plastic or glass core inside the optical fiber cable is 50 micrometers and 62.5 micrometers, respectively. The light that encodes your data travels through the fiber core. The 125m refers to the cladding's diameter, which limits the light to the core. The two, available kinds of multimode optical fiber cables are shown in cross-section. Varying bandwidths will result from the different core sizes. Because of the reduced core size, there will be more bandwidth.

Many of us already know about Forward Error Correction (FEC) as it is widely used in the networking and data communication industry. You can find it in space communication, wireless networks, bar code scanners, undersea optical fiber network, and even in your CD players. In this post, we will discuss its crucial role that helps transceivers in achieving longer reaches.